Although there is consistent evidence indicating that people perceive themselves to be less influenced than others by negative media content and persuasive communications with negative intent (viz., a third-person effect), much less is known about the perceived impact of positive media content and public service advertisements. This study investigated the perceived impact of 11 AIDS advertisements promoting a common message for safe sex, in an attempt to clarify the conditions in which people might judge themselves as more, rather than less, influenced than others. Results indicated that student respondents perceived themselves as less vulnerable than others to low-quality AIDS advertisements, but as more influenced than others by high-quality AIDS advertisements. Respondents who believed strongly that it is good to be influenced by AIDS campaigns saw themselves as relatively vulnerable to such messages, whereas other respondents did not distinguish between the level of impact on self and other. Results are consistent with motivational accounts that emphasize the ego-enhancing function of social comparisons.